Storage tank



FIG. 1 is an isometric view from one side and the rear of the storage tank showing the design.

FIG. 2 is a first side elevational view of the storage tank showing the design.

FIG. 3 is a front elevational view of the storage tank showing the design.

FIG. 4 is a rear elevational view of the storage tank showing the design.

FIG. 5 is a second side elevational view of the storage tank showing the design.

FIG. 6 is a top plan view of the storage tank showing the design; and,

FIG. 7 is a bottom plan view of the storage tank showing the design. 

CLAIM The ornamental design for a storage tank, as shown and described. 